We all know that JAV is known for plot-heavy porn, but not every plot is as good as the next. Especially for those of us that don't understand Japanese well enough to follow along, it further exacerbates how big a difference a good plot can make. Today we're taking a look at my favourite plot, cheating with your girlfriend's sister. This series originally comes from Prestige's series Her Older Sister Is Just Asking To Get Fucked and has been made popular from Oppai's series My Girlfriend's Elder Sister Tempts Me With Her Big Tits, Saying It's OK To Creampie Her (which I often refer to as GES for short).

This plot structure is pretty straight forward as it is all about cheating on your girlfriend with her sister. The boyfriend gets tempted by how attractive she is, one thing leads to another, and then the two are going at it behind the girlfriend's back, trying not to get caught. It's a truly wonderful plot for so many reasons and there are so many great implementations of it. With that said, let's jump into it.

Plot Structure

One major thing that I like quite a bit about these videos is that they all follow a basic plot structure that is simple and easy to follow. Like many, I quite enjoy when the plot can be interesting while not requiring me to fully understand Japanese, so all the visual stuff we get really aids in that department. It's also a concept that, with just a title, you can figure out what's going on in the video. For example, My Girlfriend's Elder Sister Tempts Me With Her Big Tits, Saying It's OK To Creampie Her is a series name that is not too long but describes exactly what you need in order to understand what's going on. It's very easy to follow along that her cleavage is tempting the boyfriend, or that they need to be quiet when the girlfriend is in the background, and I think that goes a long way for me.

All videos with this plot structure have four main parts to them. While the outline below is the general structure, videos do mix up things from time to time.

Intro

All the videos start off showing the guy and his girlfriend together and something going on with the sister. It can be anything from noticing how big her tits are in her tank top to walking in on her in the washroom. This is meant to set the stage for the video and give the guy a reason to be interested in cheating. Typically speaking, the sister also becomes interested at this point. These videos are always framed from a perspective of the girlfriend tempting the guy, so it's important that they establish a reason for it during the intro. They also generally tackle it from a perspective of the guy meeting his girlfriend's sister for the first time. That gives a more natural flow to the video since they can frame it as the guy being surprised she's so hot.

Escalation

Things then escalate as the sister tries to tempt him. They sometimes start this off in an extended intro as the sister gives him a peek or whispers something naughty in his ear. However, the most important part of the escalation is that something sexual that isn't quite intercourse happens. That usually amounts to something like a blowjob or a titty fuck. The goal during this period is to tempt the boyfriend further until he can't hold back from having sex. The plot structure puts sex as this ultimate line to cross, so it does best when they give you sexual things to work toward it.

Sex, and then some

We finally get to the crux of the plot, which is the boyfriend and the sister having sex. The sister has finally tempted him to go all the way, whether it's because she's nice and curvy, offering him creampies, or just flat out more attractive. At this point all hope is lost for the guy and he becomes putty in her hands. Once they've had sex the two are really free to do whatever they want to do. The guy's past the point of resisting her charm, so it's really free reign up to the director at this point. That will typically involve a pile of random things, from simple quickies to bath tub scenes to more sex. Again, it's all up to the director to make the choices here.

Ending

The final act is where they get caught right in the middle of it. Final scenes are always a sex scene where they get caught at some point. The endings range quite heavily actually with the only commonality being that the girlfriend finds out at some point. Some studios take the easy route and have the girlfriend catch them mere moments before the video fades to black, others take a much more involved route where the girlfriend tries to win back her boyfriend with sex. However you slice it though, they always get caught in the thick of things, bringing the plot full circle.

There are two important things that aren't quite part of the plot structure but are also related and very important aspects:

Relationship

One of the more important things is that the female lead (the sister) and the girlfriend have some sort of intimate relationship. It's important that the girlfriend feels betrayed by someone she thought incapable of doing so. This is why the lead is almost always the sister and always lives together with the girlfriend.

Risk

The video is centered around the whole thing being super risky and everything that happens being behind her back. It's a really fundamental point that the girlfriend is always around, whether she's just off in the other room or interrupting in the middle of getting it on. This is actually the key point that sets this plot structure apart from other videos. It's really easy to do a cheating video but it's a totally different video when that cheating is right at the forefront of it.

The Series

There are, to my knowledge, six major series by six studios that cover this plot. There are some others that come close, but these all contain the basic plot structure I spoke about. Really, I had to draw the line somewhere with what is and isn't considered part of this plot structure which is why both of the two added points above (relationship and risk) were factors. Below are the six series and the core identities of each series.

My Girlfriend's Elder Sister Tempts Me With Her Big Tits, Saying It's OK To Creampie Her - Oppai

• The sister is older
  • Occasionally the sister is the mum instead
• The sister is bustier than the girlfriend, which acts as a means for temptation
• All the sex scenes end in creampies, which is also a means for temptation
• The girlfriend catches them in the act and unsuccessfully pleads for them to stop as they continue for several minutes
• Has 58 entries
  • Oppai continually puts out new videos, several per year, and will reach 60+ this year

My Girlfriend's Sister Tries To Seduce Me With Her Big Tits - Idea Pocket

• The sister could be older or younger
• The girlfriend usually catches them in the end
  • one entry is a lone exception to that rule
• The video might or might not use creampies
  • this depends on the actress's willingness to do creampies as not everyone at IP does
• The girlfriend was always credited
  • extras are typically not credited even if they're well known
• Has just six entries
  • the latest has an early 2021 release date

I'm Terrible; Giving Into Temptation - S1

• The sister is younger
• The girlfriend is bustier
  • S1 has quite a few actresses on their roster that aren't busty but they've exclusively used their busty actresses for this series
• The girlfriend catches them after they've finished and the video fades as the actress is embarrassed about getting caught
• Has 11 entries

Her Older Sister Is Just Asking To Get Fucked - Prestige

• The sister is older
• The girlfriend not only catches them in the final scene, she joins in as well
  • the girlfriend is also uncredited for some reason, even when it's a well known actress like Kokoa Aisu or Shiori Tsukada (though this was early on in their respective careers)
• Has 22 entries
  • the earliest was in 2013 and was also the first of this plot structure
  • the most recent was in 2020

My Girlfriend's Little Sister Loves Me So Much We Secretly Try For A Baby - Honnaka

• The sister is younger
  • Honnaka still manages a wide variety of actresses including body types
• Creampies with a pregnancy fetish for added temptation
• The girlfriend catches them in the final minute or so of the video
• Has 30 entries
  • is still going strong with entries as recent as this summer

My Girlfriend's Big Sister Secretly Tempts Me - Moodyz

• The sister is older
• The girlfriend catches them in the act and unsuccessfully pleads for them to stop
• Has just three entries
  • the last entry was in 2017

Why The Concept Is So Great

Unspeakable Act

I think a big reason why I like it is that the concept borders on an unspeakable thing but doesn't go too far in that direction. On one hand, people like to think they're all shining knights who would never cheat on their girlfriend, but some of these actresses might make you think twice. It's not a line that's too far to cross (at least as far as what porn sometimes does) and so it comes across as being just naughty enough to be hot.

Hold the Moan

Hold the moan is a concept that is surprisingly hot. This idea of trying to avoid being caught just makes everything that much more exhilarating. When you add in just how risky it is (because the consequences are really significant) it makes it that much more exhilarating. I think hold the moan also goes over a lot better in JAV because of how much people tend to dislike moaning in JAV. While not everyone has a high-pitched whine, being able to prevent a lot of that really does go a long way.

Risky Action

It's also a really big deal that the videos are non-stop risky, or at least have the potential to be. Getting blown in the kitchen while prepping some food? Maybe the girlfriend is at the table having a conversation with him. Getting a titty fuck in the tub? The girlfriend might have a brief conversation from just outside the room. Things are just totally different when there's that constant reminder of the girlfriend in the middle of things. Sometimes that's them scrambling at the end to not get caught, sometimes it's even them hiding in the middle of a scene.

Easy to Follow Along

As someone who doesn't speak Japanese it can often be difficult following plots. I appreciate this concept so much because understanding Japanese isn't required to enjoy the video. The concept is very clear from the start, but more so from the actual content itself. It's easy to understand the guy is cheating on his girlfriend and doing it behind her back, especially when she's literally in the background. The same is true when they're made to scramble at the end of a scene, or even in the middle of a scene. I also appreciate when they get caught at the end and you get to see everyone's reaction; you can definitely tell they messed up. Not needing the dialogue to understand the vast majority is a really underrated factor.

Actress Performing

One of the best parts is how great the performances are. As I mentioned with the hold the moan aspect, JAV actresses are stereotyped for being submissive and whiny. This video is anything but that, giving them a wide variety of ways to perform. They get to be seductive and tempting early on to set the stage; They have to act shocked and surprised when they almost get caught, ideally laughing it off; They've got to lead the action during sex and be upbeat; The ending also gives them the flexibility to act how they want, including showing their sister exactly why her boyfriend chose her instead. Simply put, you get the opportunity for some really wonderful performances.

Creative Freedom

A really great quality about this concept is just how much creative freedom the video has. You know the main setting is at their home and you know that they need to have risky sex, but everything else is left to the director. Fun in the shower? A blowjob behind the kitchen counter? Hell, in Yua Mikami's video she even has sex with him at a restaurant. There's just so many ways the video can spin the concept that I don't find myself being bored of the content like I do with other concepts.

The Best Parts

Now that we've gone over the different takes and what I like so much about it, it's time to talk about what the best parts are. 

First off, I think the best intros are ones where the impetus for the rest of the video is very clear. I like to see something happen that clearly tempts the guy, bonus marks whenever they make it happen without trying too hard. My personal favourites are when they happen to see them nude. The guy obviously can't resist looking and the sister notices. Just take a look at the intro from Erika Kitagawa's video shown above.

Secondly, I like videos with creampies better than those without. It's nicer when they give the guy a little something extra to tempt them. Just imagine the sister whispering in your ear "she makes you use a condom, right? I'll let you do it raw", that's some hot stuff right there. Again, the more reasons to cheat the better.

I think the videos that involve the girlfriend more throughout the video do it better. The concept is centered around the cheating and it's really important to actually show; I find in cases where they don't do it that the concept just falls flat.

I also strongly prefer videos where the ending involves the girlfriend more. When it happens mere moments before the video ends it feels like you don't get enough time to enjoy what's going on. Maybe some might prefer that but I tend to enjoy letting that betrayal simmer. I find it gives great opportunities for the actress to express herself and give you a really great performance. I tend to prefer Oppai's take on it as they're able to utilize the girlfriend without going overboard in that direction. In series where the girlfriend participates, like in Prestige's, I find it's a bit awkward because you have to enjoy the sister too. It's very rare that you find videos in this series where you like both the girlfriend and her sister so when the sister isn't involved sexually it's much better.

My Favourite Series

My favourite series of the bunch comes from Oppai with My Girlfriend's Elder Sister Tempts Me With Her Big Tits, Saying It's OK To Creampie Her. It should come as no surprise to many that is my favourite series of the bunch given that I'm all about big tits but there are a lot of good reasons why it's my favourite. In fact, it's not just my favourite series with this concept, it's my favourite series period. With that said, here are some of those reasons:

Firstly, it has great temptation methods. Big tits really are a good way to tempt the guy. Some videos really struggle with the temptation part and Oppai really has no shortage of ways here. Honestly just a low-cut top exposing some cleavage can be enough, especially when the actress notices him staring. This series tends to take the time with the temptation to really set the mood, including a great common scene where she gives a footjob under the table. I also like the creampies this series uses, another nice way to tempt the guy. It's hard to resist when she's whispering in your ear "she makes you use a condom, right? You can do it raw with me". I also find that the actress being older goes over well when she's dominant as it makes you think she has more experience.

Secondly, the series stars so many great actresses. The list of my favourites it stars goes on and on but just to name a few: Hitomi, Julia, Rena Fukiishi, Asahi Mizuno, Ai Sayama, Anri Okita, Erika Kitagawa, Yu Shinoda, Touka Rinne, Meguri - it really does just go on and on. This is especially true when compared to S1, IP, and Prestige that all use an exclusive roster for this whereas Oppai uses freelancers. Using freelancers gives so many opportunities for good actresses.

To add to that the video manages to star a lot of newer actresses as well. As much as I dislike having new actresses star in the series before they're skilled enough to do it justice, I can't deny that it has been a way for me to watch some new actresses. Some actresses I first checked out in this series include: Riho Fujimori, Matsuri Kiritani, Yuria Yoshine, and Hinata Koizume.

Thirdly, it's still going strong today and is almost at 60 entries. There are very few series in general that have quite this many entries and still continue to regularly put out new videos (the only one that immediately comes to mind is Wanz Factory's Raw Creampie Sex - If You Can Handle It). The fact that you consistently get new entries with this series is wonderful, always something to look forward to. Especially knowing the actresses that could potentially star in the future (Chitose Saegusa, Yuri Honma, Mako Oda, Shiori Tsukada, Honoka Mihara, Arisa Hanyu, just to name a few), you always feel like there's good content on the horizon.

Conclusion

This concept is far and away my favourite concept and Oppai's series is far and away my favourite series. Oppai's series alone contributes several of my all-time favourite videos and despite having nearly 60 entries I've reviewed all of them. Speaking of Oppai's series, check back later on in the year as I do a deeper dive into that series and count down my top 10 entries. Anyway, I hope you've enjoyed this post, if you've got any favourites from this plot make sure to share them in the comments. Until next time!